<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8" />
		<title></title>
		<script type="text/javascript">
			var a=90;
			var flag;
			flag="option";
			alert("head");
			///
			function show () {
				alert("mouse clicked me");
			}
		</script>
	</head>
	<body>
		<button type="button" onclick="alert('yes');"></button>
		<button type="button" onclick="show()">a</button>
	</body>
</html>
